In this case, Warren Murphy, one of the creators of The Destroyer series, declared them to be non-canon. The books were written by someone picked by Gold Eagle who had no contact with Warren and very little knowledge of the series and the books were pretty bad. When Warren got the rights back from Gold Eagle, he moved the series to TOR books and declared books 132-145 to be non-canon, meaning they never really happend in The Destroyer universe. Warren then started writing the books again with his new partner, Jim Mullaney.
Dale
If I give you a shiny nickel will you think with your mouth closed? (Remo Williams)